What about WiFi calling and abroad?

Calls from abroad cannot be made via WiFi. Calls in Denmark to abroad can.

So be aware that you cannot use the hotel's free WiFi network to call home to the family when you are on holiday abroad. In this case, you will use the country's mobile network and be charged a normal international rate.

If you call from Denmark to abroad, you can use WiFi calling, but again be aware - you still pay the same rate as with a normal call abroad. It's just the signal that gets better - the price doesn't change.